<!-- 属性名:justify-content -->
<!-- 属性值: -->
<!-- flex-start:默认值,弹性盒子从起点开始依次排列 -->
<!-- flex-end:弹性盒子从终点开始依次排列 -->
<!-- center:弹性盒子沿主轴居中排列 -->
<!-- space-between:弹性盒子沿主轴均匀排列,空白间距均分在弹性盒子之间 -->
<!-- space-around:弹性盒子沿主轴均匀排列,空白间距均分在弹性盒子之间 -->
<!-- space-evenly:弹性盒子沿主轴均匀排列,弹性盒子与容器之间间距相等 -->

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Flex布局-主轴对齐方式</title>
    <style>
        .box {
            height: 300px;
            border: 1px solid #000;;

            display: flex;
            
            /* justify-content: flex-start */

            /* justify-content: flex-end; */

            /* 居中 */
            /* justify-content: center; */

            /* 父级剩余的尺寸分配成间距 */

            /* 弹性盒子之间的间距相等 */
            /* justify-content: space-between; */

            /* 间距出现在弹性盒子两侧 */
            /* 视觉效果:弹性盒子之间的间距是两段间距的两倍 */
            /* justify-content: space-around; */

            /* 各个间距都相等 */
            justify-content: space-evenly;
        }

       .box div {
            width: 200px;
            height: 100px;
            background-color: pink;
        }
    </style>
</head>
<body>
    <div class="box">
        <div>1</div>
        <div>2</div>
        <div>3</div>
    </div>
</body>
</html>